Duplicate Texture Memory with Sprite Atlas

Hello Unity community,

I currently have one issue understanding how Unity manage Sprite Atlas texture memory when requesting a sprite.

My sprites are mainly used for UI (using UI/Default shader) with Image component ( not the raw image one) and all my sprites are packed in the new Sprite Atlas system.

But when I check the memory state, it seems that the Sprite Atlas texture and the sprite alone are loaded in memory. I was expected that the memory won't be duplicate. I am not using my sprites as texture. (Here motif-top and motif-top-2 that are clearly included in the AtlasBigScanner are duplicate) (Here is how are the settings of my imported sprite) Is this a normal behaviour from Unity or am I missing something ?